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UV Clarifiers

UV Clarifiers

Pond UV Clarifiers & Sterilisers

Green algae is not necessarily a sign of poor water but quite the contrary Koi and wildlife have no problem thriving in water with green algae present.

Ultra Violet Clarifiers and Sterilisers are primarily used on a pond or water feature to keep the water crystal clear and reduce green algae growth to enhance your enjoyment and ability to see through the water and the fish in the water.

Ultraviolet wavelength

There are two main types of UV units available. UV Clarifiers and UV Sterilisers.

UC clarifiers are used to kill green algae where as UV sterilisers, sterilise the water passing through the emitted rays killing 99% of algae and bacteria making them a much more effective piece of equipment.

However both UV clarifiers and sterilisers will keep your pond water free of green algae so long as they are sized and installed correctly.

As a general rule of thumb 10 watts per 1000 UK gallons of water is a minimum but can be increased if pathogen reduction is desired.

For help selecting the correct UV for your requirements please don’t hesitate to contact the team at Utopia Koi and we will be happy to help.

Please ensure that all delivered UV clarifiers and replacement bulbs are thoroughly checked upon receipts and signed for un-checked or damaged to ensure a delivery damage claim can be made.

  • Evolution Aqua UV Clarifier


    The Evolution Aqua UV Clarifier delivers a more efficient and more economical performance than before thanks to their new design.

    The new range has been completely redesigned to include 6 models that will cover a wide variety of pond design and water volumes with ease.

    The range begins with 15 Watt and 25 Watt models perfect for use on the smaller garden pond culminating in the110 Watt model with is ideal for a large pond or aqua scape.

    The evo range has been design to optimises flow rates and improves energy efficiency, with the sole focus to deliver optimum performance at all times to clear green water in ponds which is caused by single celled green algae.

    Evo UVs will work alongside many different filtration systems and are incredibly easy to install with flexible hose or hard pipe and can be easily fitted within existing pipework runs.

    All evo UV models come with high output UV bulbs powered by energy efficient ballasts, all housed within a fully watertight, robust housing.

    Spare Quartz Sleeves available.

    Evolution Aqua UV Clarifier Technical Summary:

    • Electronic Modern Energy efficient Ballast
    • Water Flow Efficient
    • Horizontal or vertical installation
    • 1.5” Inlet & outlet 15W, 25W, 30W, 55W and 75W Models
    • 2” Inlet and outlet 110W model
    • Utilises a standard 2 pin UV bulb

    View EVO UV Manual

    Watch Evo 110W Video Watch Evo 15W to 75W Video
    evo 15 15,000 L 3,300 UK Gallons 7,500 L 1,650 UK Gallons 15W 1.5” 530 x 167 x 88
    evo 25 20,000 L 4,400 UK Gallons 10,000 L 2,200 UK Gallons 25W 1.5” 580 x 167 x 88
    evo 30 30,000 L 6,600 UK Gallons 15,000 L 3,300 UK Gallons 30W 1.5” 980 x 167 x 88
    evo 55 55,000 L 12,100 UK Gallons 20,000 L 4,400 UK Gallons 55W 1.5” 980 x 167 x 88
    evo 75 75,000 L 16,500 UK Gallons 25,000 L 5,500 UK Gallons 75W 1.5” 1280 x 167 x 88
    evo 110 75,000 L 16,500 UK Gallons 25,000 L 5,500 UK Gallons 2 x 55W 2” 1055 x 230 x 160

  • Amalgam 3-Piece UVC


    Amalgam 3-Piece UVC – Piece Submersible UV Clarifiers are in our opinion one of the best UV clarifiers available and extensively used at Utopia Koi.

    The 3-Piece design consists of a quartz sleeve, UV bulb and ballast and has the option of the specially designed 32mm tank connector allow for easy installation and maintenance such as a bulb change.

    The Amalgam 3-Piece UV is designed to be installed directly in to a body of water such as a drum filter ensuring there is no effect on water pump flow rates or increase in resistance on your water pump creating a very energy efficient installation.

    The Amalgam UV clarifiers bulb has an effective life span of 9000 hours and emits a wavelength of 253.7nm ensuring a lethal effect on bacterial.

    The Amalgam 3-Piece UVC is available in two sizes.

    40 Watt Amalgam 3-Piece Submersible suitable for ponds up to 6000 UK Gallons. 50cm length

    80 Watt Amalgam 3-Piece Submersible suitable for ponds up to 12000 UK Gallons. 78cm length

    Ensure that you do not look directly at the bulb whist switched on and illuminated

    Ensure that the illuminated bulb does not come into direct contact with skin

  • Bio UV Steriliser


    Bio UV sterilisers are amongst the most efficient available and are manufactured with superior build quality from 316L stainless steel.

    Water flow efficiency and water disinfection has been taken to a whole new level. The units are supplied with either a 2” or 3” inlet / outlet depending on the model chosen to meet with the requirements of low energy water pumps.

    Designed to operate with a 99% kill rate of algae, bacteria and viruses when the water passes through the unit they form part can form part of a very effective pond filtration system for the discerning Koi Keeper.

    Bio UV Steriliser Technical Summary:

    • Made from UV-C 316L stainless steel
    • Very long lamp lifetime of over 13,000 hours
    • Dedicated electronic ballast ensuring the maximal UV-C efficiency of lamps
    • Lamps working indicator lights
    • Efficient design with reduced pump head losses
    • Drain valve

    View Bio UV Steriliser Manual

    view product video
    Bio UV 10 3600 UK Gallons 2500 UK Gallons 30W 50mm 420 x 150
    Bio UV 20 6250 UK Gallons 4,000 UK Gallons 55W 50mm 690 x 150
    Bio UV 30 10,000 UK Gallons 6,000 UK Gallons 87W 63mm 870 x 150
    Bio UV 40 14,000 UK Gallons 9,000 UK Gallons 105W 75mm 1200 x 150

  • Triogen UV Steriliser


    Triogen UV Steriliser have a small footprint and low power consumption. They are easily installed, having the unique advantage of selectable inlet and outlet positions to suit the pipework arrangement.

    The inlet and outlet unions allow easy connection onto existing or new systems and are supplied with both metric and imperial connectors.

    The low pressure UV lamps are powered by electronic ballasts which are weather protected within the reactor top cap. This makes the units suitable for outside applications.

    All units incorporate an external pressure gauge and an internal pressure switch which automatically turns off the UV lamps in a low flow condition.

    The semi-transparent centre ring allows visual confirmation that all lamps are operating correctly.

    Another unique feature is that it is possible to add additional lamps and ballasts to an existing unit should extra treatment capacity be required in the future.

    Available with 1, 2, 3 or 4 bulbs. 645mm in hight and a diameter of 230mm. 2” inlet and outlet.

    Each bulb provides 58W of ultra violet radiation.

    Maximum flow rate 2200 Uk Gallons per bulb.

    • Control of “green water”
    • Disinfection of pathogenic micro-organisms
    • Low capital and running costs
    • 18 month or 12,000 hour lamp life
    • 100% corrosion resistant UV inhibited polymeric reactor vessel
    • Materials suitable for ponds with increased salinity or salt water
    • Supplied with a 2.4 meter power lead
    • All units are CE approved

    View Triogen TR-2 Instruction Manual

  • Yamitsu Algea Master UV Clarifier


    Yamitsu Algea Master UV clarifiers are a reliable cost effective method of algae removal for ponds and water features.

    Manufactured with UV stable materials and supplied with uniquely designed bulbs that incorporates a turbulator to ensure a fantastic performance and a longer life for the whole unit.

    Available in single bulb or twin bulb units the algae master clarifying units aid other forms of filtration to help leave your pond clear and healthy.

    Yamitsu Algea Master Technical Summary:

    • 1.5” inlet and outlets
    • Available in 11W, 15W, 25W, 30W and 55W & 110W
    • Supplied with Hose tail connectors & wall Clamps
    • Utilises a standard 2 pin UV bulb

  • TMC Pro Clear UV Clarifiers


    TMC were one of the first manufacturers of UV clarifiers and have been supplying units since 1970 offering pond and water feature hobbyists a simple and effective solution to green algae.

    The range of TMC Pro Clear UV Clarifiers are suitable for the smallest of ponds through to large ponds of up to 16,000 gallons and produce effective ultraviolet radiation at a wavelength of 254 nanometers.

    The UV light bulb is protected by a fused quartz glass sleeves which allow the highest rate of Ultra Violet radiation through, whilst stopping any water from affecting the bulb.

    Pro Clear UV Clarifiers can be connected to either flexible or rigid plumbing using the appropriate plumbing fittings (not supplied) and are available in a range of sizes. 15W, 25W, 30W, 55W & 110W.

    To ensure unrestricted flow, TMC recommended that the unit is not plumbed in with anything less than 1.5″ pipework and up to 2” on the 110W unit. The units can be used for pressurised systems such as bead filters up to 3 bar (43.5psi).

    TMC Pro Clear UV Clarifiers Key Features:

    • Ergonomic, compact design
    • New energy efficient, electronic control gear
    • Universal 2″ and 63mm solvent weld inlet and outlet ports
    • Individually chambered lamps for optimum efficiency and contact time
    • Easily wall mountable
    • Utilises a standard 2 pin UV bulb
    • Supplied complete with a 5m cable and a 24 month guarantee

  • Replacement UV Bulbs


    Regular replacement of your UV bulbs is an absolutely essential maintenance regime that needs to be adopted by you to ensure that your pond water is kept clear and free of green algae and other pathogens.

    Changing the UV bulb every 6 months is optimal If not otherwise directed by the specific instructions for your particular UV clarifier or steriliser.

    Where specific, specialist Replacement UV Bulbs are required for certain UV clarifiers sold by Utopia Koi they are listed in the pricing options for that particular UV clarifier however many UV clarifiers use a simple bulb with two pins at each end.

    At Utopia Koi we have a range of 2 pin bulbs to suit the most demanding installations comprising of Osram and Philips bulbs.


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Pond liner calculator

Use our simple Pond Liner Calculator to estimate the liner and/or underlay size required for your pond.

The result allows for an overlay either side of 30cms. You may wnat to increase or decrease this value depending on your pnd installation.

If you're not sure on what size you need then contact us and we can help.

Measurements are entered in meters. As an example if your pond is 254cm deep at its deepest enter 2.54.

The liner dimensions for your pond including a 30cm over lap are:

Liner length:

Liner width:

An interesting fact for you. The water volume of your pond will be:


UK gallons:

Rectangle Pond Volume calculator

Pond Diagram

Measure the length of your pond, the width of your pond and the depth of your pond in meters and enter the measurements into the Utopia Koi easy to use pond volume calculator. This will give the volume in litres.

If you're not sure on what size you need then contact us and we can help.

Measurements are to be entered in meters, for example: 543cm would be entered as 5.43.

The water volume of your pond will be:

Volume in Litres:

Volume in UK gallons:

Circular Pond Volume calculator

Radius Diagram

Measure the diameter of your pond (the distance across the pond at its centre) then divide the diameter in two to get the radius of your pond.

Now measure the depth of your pond and enter the measurements into the Utopia Koi easy to use circular pond volume calculator.

If you're not sure on what size you need then contact us and we can help.

Measurements are to be entered in meters, for example: 543cm would be entered as 5.43.

The water volume of your pond will be:

Volume in Litres:

Volume in UK gallons:

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